Guarding against terrorist attacks on Facebook

Facebook has almost 200 million users. Each one revealing personal information about himself and also connecting to other users by appliations, Causes, freinding etc. Some smart but evil person could use that trove of information to really hurt someone if he wanted. Already facebook uses it to tailor advertising. and they know where you click. I've logged on and deleted a bunch of applications today and ignored many requests. I hope I have not offended me friends and relatives but I do not want to be the one who gets attacked by the terrorist.
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